/*
 * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.sentry.util;

import org.jetbrains.annotations.ApiStatus;
import org.jetbrains.annotations.NotNull;

/**
 * ExceptionUtils
 *
 * @since 2021-06-02
 */
@ApiStatus.Internal
public final class ExceptionUtils {
    /**
     * Returns exception root cause or the exception itself if there are no causes
     *
     * @param throwable - the throwable
     * @return the root cause
     */
    public static @NotNull Throwable findRootCause(final @NotNull Throwable throwable) {
        Objects.requireNonNull(throwable, "throwable cannot be null");
        Throwable rootCause = throwable;
        while (rootCause.getCause() != null && rootCause.getCause() != rootCause) {
            rootCause = rootCause.getCause();
        }
        return rootCause;
    }
}
